Apparatus for making cores.



V D. J. RYAN.

APPARATUS FOR MAKING CORES I APPLICATION mm $153.4. 1914-.

Patented Feb. 5, 1918;

3 SHEETS-SHEET I u. I. RYAN. APPARATUS FOR MAKING COX-HESa APPLlCATiQN FiLE ID FEB- 4, i914.

Pmmd m. 5,1918.-

3 SHEETS--SHEET 3- our DANIEL 3'. RYAN, OF CLEVELAND, OHIO.

APPARATUS FOR MAKING CORES.

Specification of Letters Patent.

Patented Feb. 5, rare.

Application filed February 4, 1914. Serial No. 816,461.

To all whom it may concern:

Be it known that I, DANIEL J. RYAN, citizen of the United States, residing at Cleveland, in the county of Cuyahoga and State of Ohio, have invented certain new and useful Improvements in and Relating to Apparatus for Making Cores, of which the following is a specification.

My invention relates to apparatus for making cores. More particularly, the invention has reference to the core box structure, whereby a single core or a plurality of cores can be readily and economically made.

One object of the invention is to provide a core box structure having a removable core box or boxes permitting the substitution of different sized or shaped core boxes, whereby cores of varying sizes and shapes can be readily made by using interchangeable core boxes and without alteration of the core box structure.

Another object of my invention is to providea core box structure having one or more removable core boxes formed. from separable sections. capable of being readily built, fitted in position and removed from the core box frame.

Another object of the invention is to provide a core box structure having a sectional core box which is removable with the core and thereafter separable therefrom.

Another obiect of my invention is to pro vide a core box structure adapted to make a core or a plurality of cores from green sand.

WVith these and other objects in view, the invention consists in the parts and combination of parts hereinafter described and claimed.

For the purpose of illustration I have herein disclosed my invention in connection with and for the making of cores for engine pistons, since my invention is particularly applicable to the making of green sand cores having irregularly shaped side walls. It will be understood, however. that my invention is applicable to the making of other cores, the walls of which may be either straight or irregular.

For the purpose of illustrating my invention, I have selected and hereinafter described one construction embodying it.

F u l i a P spe tive iew 1 m i e having a core box frame mounted thereon, the bed of the machine being slightly rotated to facilitate the illustration.

Fig. 2 is a front elevation of the core box structure embodying my invention, showing the cover or mold board clamped in position.

Fig. 3 is a longitudinal section through the core box structure.

Fig. l is a section on the line 4l4= of Fig. 2.

Fig. 5 is a sectional view similar to Fig. 4 before the core box is filled with sand and tamped.

Fig. 6 is a perspective view of a core box, the parts thereof being slightly separated from each other.

Fig. 7 is a sectional view somewhat onlarged, of a portion of the core box frame, through one of the core boxes,'on the line 77 of Fig. 8.

Fig. 8 is a top plan view of Fig. 7, parts being broken away.

Figs. 9 and 9 are elevations of two different sized core box sections.

Fig. 10 is a perspective view of a drag and cores formed in the core box structure, the core box sections for one core being entirely removed, and one of the sections of another box being omitted.

Fig. 11 is a fragmentary sectional view through a core after the core box sections have been removed.

Figs. 12 and 13 are views of a slightly different form of the invention as embod ed in a core box formed of two sections, Fig. 12 being a side elevation of one core box section and Fig. 13 illustrating the assembled sections in perspective.

Fig. 1 is a perspective view of the clamp ing device.

In the drawings, 1 indicates a machine adapted to support during the making of a core or cores, a core box structure, indicated as an entirety at 2. The machine 1 may be of any standard or preferred form and preferably constructed and adapted to facilitate the rapid and economical making of the core or cores.

The machine 1 is preferably provided with a bed 1, which, under the control of a lever l (or other suitable mechanism) may be jolted to properly tamp the sand, as will be later set forth. T bed 1 may be mounted on trunnions 1, whereby the core box structure can be rolled over for a well known purpose. r

1 indicates a vertically movable carrier adapted to support the core or cores, after they have been formed, and to lower them, whereby they will become disengaged from the core box frameor support. The carrier 1. maybe operated up and down by any suitable mechanism. The elevating and lowering mechanism preferably comprises a coil spring 1 one end of which is connected to the frame of the machine 1 and its other end connected to the lever mechanism 1 for the carrier 1. The spring 1 is preferably arranged to be placed under tension when the carrier 1 is moved downwardly by the lever mechanism 1. The carrier 1 maybe actuated manually by means-of a foot lever 1 As a result of this construction, thespring '1 normally operates to lift the carrier 1 upon the release of a lock device which holds the carrier 1 in its lowermost position.

It will be understood that'the machine 1, referred to and illustrated herein, in itself, forms no part ofmy present invention, but that it simply serves as a suitablesupport for the core box structure 2 and lends itself to the convenient and rapid operation thereof duringthe making of the cores.

The core box structure 2 comprises a core box frame 2 and one part of a flask, 2", preferably the drag thereof, adapted to be detachably fixed to the core box frame 2 by suitable clamping devices 2. The core box frame 2 is arranged to be fixed to the bed 1" of the machine 1 in any well known way; it may bedetaehably fixed thereto in order'that it can be removed when desired. The core box frame 2 'comprises a. plate 2 provided with one or more cup-shaped, core box receiving and supporting members 2, the upper ends of which preferably lie flush withr'the upper surface of the plate 2. The lower ends of the members 2 are preferably closed by plates 2 which may be formed integral with the walls thereof. The walls of each support or member 2 arerecessed,

as shown at 2 and provided at one side with a stop 2 set forth.

3 indicates the core boxes, each removably mounted in one of the cup-shaped members 2 Each core box 3 preferably comprises for a purpose to be later 7 two semi-cylindrical sections 3, 3 and a cap 3 adapted to form a core of the-desn'edsize and shape when filled with sand and tamped in the manner hereinafter described. Each cap 3 is positioned at or near the inner end of the-adiacent supporting member 2 and connected thereto in any suitable manner. However, when aplate 2 is provided, thecap may be detachablv fixed theretoby a'screw 3, or other suitable device as shown in Figs. 4-, 5 and 7. The cap is provided with an annular bearing surface which is snugly engaged by the inner end edges of the core box sections 3, 3. The opposite side edges of the sections 3 3, are suitably finished to fit closely together when assembled in the support 2. The outer end edges of the sections 3, 3, are provided with flanges 3 which fit within the recess 2 in the wall of the support 2. At 3 each flange is cut away to receive the stop 2*, the engagement with which determines the angular position of the core box sections 3", 3*, within the support or member 2.

The inner end of each core box section 3" is provided with a wall or a flange or rib 3 which forms the seat member to engage with the wall of the member 2, whereby the section may properly fittherewithin. It will be understood that the seat members 3 and 3 vary in width according to the internal sizeof the core box 3, (see Figs. 9 and 9) so that each section 3 thereof may be properly positioned to cooperate with the other section 3 constituting the core box 3to form a. core of the desired size.

In actual practice, the core box frame 2 is provided with one or more receiving members 2, each adapted to receive a core box 3 which is capable of forming a core for the largest sized piston or other device which the structure 2 may at any time be called upon to make. By this construction I am enabled to insert in the receiving members 2 core boxes 3 of varying internal sizes to form cores of any desired diameter and shape within the capacity of the structure. In the core box frame 2 herein illustrated I have adapted my invention to the makil'ig of four cores simultaneously. It will be understood, in this connection, that such frame may be arranged to form a greater or less number of cores. Furthermore, since each core box 3 is insertible and removable independently of the remaining core boxes, I am enabled to form a plurality of cores of similar size or to make them of different sizes.

4: indicates a suitable shaped pattern, preferably fixed to the frame plate 2, to form a central metal receiving basin and gates leading therefrom. as will be readily understood by those skilled in the art to which my invention relates.

In operation, the core box frame 2 is arranged in horizontal position with the desired sized core boxes 3 positioned in the receiving members 2 thereof. The drag 2 is mounted on the frame 2, the pins 2 on the plate 2 fitting the openings formed in lugs 2" on the drag 2 thus causing the drag to be properly positioned. Green sand is then placed in the core boxes and drag and essee? which the sand is leveled and a cover or mold board 5 placed over and secured to the drag 2 by the member 6, which forms one element of the clamping devices 2 (see Fig. 2.). The board 5 may be formed with openings 5" through which a vent forming pin may be inserted to form vents A (see Fig. 11). The core box structure 2 is rolled over and the carrier 1 elevated until it engages the cover board 5. Upon the release of the clamp member 6, the carrier is allowed to drop or move downwardly, the cover board 5, drag 2 and core box sections 3, with the cores formed within them, moving downwardly from the frame 2 and supporting members 2 with the carrier 1 under the influence of gravity. The core box sections 3 of each core box are then disengaged from the cores by movement laterally away from each other, as by the hands of the molder or in any other suitable manner. In such operatiomboth sections 3 are preferably moved simultaneously in opposite directions or radially of the axis of the core. f desired, the drag 2 and core boxes 3 with the cores may be transported from the carrier to an auxiliary support or table where the core box sections can be readily removed. The drag 2 carrying the cores may then be placed in position to have the cope (not shown) fastened to it preparatory to pourin lhe interlocking devices 2 and 3 be tween the receiving members 2 and core box section 3 are preferably provided to position the core box sections 3* with their meeting edges disposed in a plane which provides maximum space for accessibility to and movement of the sections 3 when they are separated from the core. When the core box structure 2 is arranged to form four cores,

the meeting edges of the core box sections 3 are preferably disposed in planes coincident with lines passing through the axis of the core box frame 2.

With my invention it is possible to use green sand in the making of cores and to insure that the cores will be properly positioned in the cope of a flask without any skill being required on the part of the molder or operative to secure this highly advantageous result. Thus the labor, equipment, time and expense of baking the cores and later positioning them in the flask is obviated, while on the other hand the green sand can be used over and over for making new cores.

This construction provides for rigidity of the cores relative to the drag and each other while being moved to and positioned in the flask, and during pouring, and insures a casting having uniform walls throughout its entire circumference.

Furthermore, by using green sand for making the cores, both parts of the mold may be made from the same material, to avoid unequal setting of the molten metal. I am enabled therefore to produce a casting with annular sections, the metal in the walls of which has the same quality and characteristics on its inner and outer surfaces.

It will also be understood that my invention lends itself to the rapid formation of cores, whereby the labor and expense involved in their production is materially reduced.

In Figs. 12 and 13 I have illustrated a modified form of core box 3 which is adapted for insertion and removal from a receiving member 2. In this form of construction the core box is formed of two parts, 3 3*, that is, the cap 8 instead of being separable from the core box sections, 3 is made in two .sections each of which is formed integral with one of the sections 3.

While the form of core box illustrated in Figs. 12 and 13 may be advantageously employed for making piston and other cores, 1 preferthat form of construction illustrated in Figs. 1 to 11, inclusive, as in the latter construction the operative can clearly observe the separation of the core box sections from each other and the walls of the core.

To those skilled in the art of making apparatus of the class described, many alterations in construction and widely differing embodiments and applications of my invention will suggest themselves, without departing from the spirit and scope thereof. My disclosures and the description herein are purely illustrative, and are not intended to be in any sense limiting.

No claim is made herein to my disclosed invention in process or method of making cores, such invention being claimed by me in my application for Letters Patent filed Mav 7, 1915, Serial No. 26,484.

What I claim is l. A frame provided with a core box support, and a core box removably mounted in said support and comprising a plurality of sections separable from each other, in combination with a drag.

2. A core box apparatus comprising a support, and a core box removably mounted thereon, the said core box comprising a pair of semi-cylindrical sections and a cap separable from each other.

3. A. sectional core box comprising a plurality of separable segments arranged to be placed edgeto edge and a supporting member in which the box is removably supported, in combination with a drag.

4. In. a core box structure, the combination of a supporting member, a cap arranged at the inner end of said supporting member, and a plurality of separable sections removably mounted in said supporting member and cooperable with said cap to form a core box.

5. In apparatus for forming a core, the

use

combination of supporting means having a core box receiving member, a core box comprising separable sections, one of'said sections being connected to said supporting means, and the remaining sections being freely insertible in and removable from said receiving member, whereby they can be removed from said receiving member with the formed core'before they are separated one from the other.

6. In apparatus for forming cores, the combination of supporting means having a core box receiving member, a core box mounted in said receiving member and comprising separable sections, one of said sections being connected to said receiving member and the remaining sections being freely insertible in and removable therefrom with the formed core before they are separated one from the other, each of said removable core box sectionshaving seat members which engage the walllof the receiving member.

7. 111 apparatus for forming cores, the combination of a core box receiving member, a core box mounted in said receiving member and comprising a plurality of separable sections freely insertible in and removable therefrom, said receiving member having around its receiving end an annular recess to form a seat, and a seat member extending along the outer end of each core box section and arranged to engage the annular seat in said receiving member.

8. A sectional core box adapted for assembly ina supporting member, comprising a plurality of separable segments arranged to be placed edge to edge and a cap removably engaging corresponding ends of the segments.

9. In apparatus for making cores, the combination of a supporting member, a stop device arranged at one side of said member, and a core box comprising a plurality of sections removably mounted in said member, each of said sections being movable angu larly in said supporting member for engagement With said stop device.

10. In apparatus for making cores, the combination of a supporting member, a core box removably mounted in said supporting member and comprising a plurality of sections, and interlocking means between the core box sections and said supporting member for determining the position of said sections. in said member, said interlocking means being arranged for disengagement during the first part of the movement of the core box sections when the latter are removed from said supporting member.

11. In a core box structure, the combinationof a support,a plurality of curved sec- I tions removably mounted in said support, each longitudinal edge of each section being adapted to engage the adjacent longitudinal v edgesof the adjoiningsectiontoform a cylindrical core box, and a cap mounted in said support and adapted to be engaged by corresponding ends of said curved sections when the latter are mounted in said support.

12. In a core box structure, the combination of a supporting member, a core box removably mounted in the supporting member, and interlocking means between said core box and the supporting member for positioning it in the latter.

13. The combination of a frame provided with a core box supporting member, a core box mounted in said supporting member, said core box comprising a plurality of sections removable from said supporting member and a cap, and means for securing the cap to the inner end of said supporting member.

let. In a core box structure, the combination of a plate provided with a core box supporting member, the open end of the member being disposed substantially flush with one surface of the plate, a core box removably mounted in the supporting member and comprising a plurality of sections and a cap, eparable one from the other, and means for detachably securing the cap to the inner .end of said member.

'15. In a core box structure, the combination of a plate provided with a core box supporting member, the open end of the member being disposed flush with one surface of the plate, a core box removably mounted in said supporting member and comprising a plurality of side sections and an end section; separable one from the other, means for detachably securing the end section to the inner end of said member, and interlocking means between said supporting member and the side sections of said box for determining the position of the latter therein.

16. In apparatus for making a plurality of cores side by side, the combination of a frame provided with a plurality of core box supporting members, a plurality of core boxes removably mounted in said members, a drag, and means for detachably securing the drag to said frame.

17. In an apparatus for making a plurality of cores formed of a single body of sand, the combination of a frame provided with a. series of supporting members, a core box, comprising a plurality of side sections and an end section separable from each other, mounted in each of said supporting members, said side sections of each core box being removable from its supporting member, and a dag adapted to be secured on top of said frame, whereby the core boxes and drag may be filled with sand and tamped to constitute one body with the cores integrally connected to each other.

18. In apparatus for making a plurality io fcores. side .by. side, the combinationof a meats? l frame provided with a. plurality of core box supporting members, and a plurality of core boxes removably mounted in said members, each of said core boxes being formed from a series of sections and a cap, separable one from the other.

19. In apparatus for making a plurality of cores side by side, the combination of a frame provided with a plurality of core box supporting members, the open ends of which are disposed substantially flush with the frame, and a sectional core box removably mounted in each of said members.

20. In apparatus for making cores, the combination of supporting means, and a core box removably mounted therein, said core box comprising a plurality of sections and a cap arranged to engage the inner ends thereof, said sections and cap being separable from each other and the sections being movable as a unit in an endwise direction relative to said supporting means.

21. In apparatus for making cores for piston molds, the combination of a core box comprising segmental sections and a cap, each separable from the other, and means for removably supporting said core box, the said means permitting the removal of the segmental sections with the core therefrom.

22. In apparatus for forming a core, the combination of a support having a core box receiving member, and a core box compris ing separable sections freely insertible in and removable from the receiving member, whereby said core box sections can be removed with the formed core from the receiving member before they are separated one from the other, and a cap arranged to engage the inner ends of said sections.

at). In apparatus for forming cores, the combination of supporting means having a core box receiving member, a core box mounted in said receiving member and comprising separable sections, one of said sections being detachably connected to said receiving member, and the remaining sections being freely insertible in and removable therefrom, whereby they can be removed from said receiving member with the formed core before they are separated one from the other.

24. In apparatus for forming a core, the combination of a support having a core box receiving member, and a core box comprising separable sections freely insertible in and removable from the receiving member, whereby said core box sections can be removed with the formed core from the receiving member before they are separated one from the other, said core box sections having seat members which engage the wall of the receiving member and the wall of the latter at it open end being formed with an annular recess to receive the seat members at the outer ends of the core box sections.

25. In apparatus for forming a core, the combination of a support having a core box receiving member, a core box comprising separable sections freely insertible in and removable from the receiving member, whereby said core box sections can be removed with the formed core from the receiving member before they are separated one from the other, and interlocking means between the core box sections and the receiving member fer determining a fixed relation between them.

26. In an apparatus for making a plu rality of cores formed of a single body of sand, the combination with a support, of a frame secured to said support and provided with a series of supporting members, a sectional core box removably mounted in each of said supporting members, the sections of each core box being separable from each other when removed from its supporting member, and a drag adapted to be secured on top of said frame, whereby the cores and drag may be filled with sand and tamped to constitute one body with the cores integrally connected to each other.

In testimony whereof I aliix my signature, in the presence of two witnesses.

DANIEL J. RYAN.

Witnesses:

J. F. Souns, G120. B. Pirrs.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

